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Finding the Fourth Proportional to 698,850.81, 964,401.42 and 388,751.88

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Solution

The fourth proportional to 698,850.81, 964,401.42 and 388,751.88 is: 536,470.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    698,850.81 : 964,401.42 = 388,751.88 : x
  2. Step 2: Convert to fraction form
    698,850.81/964,401.42 = 388,751.88/x
  3. Step 3: Cross multiply
    698,850.81x = 964,401.42 × 388,751.88
  4. Step 4: Simplify right side
    698,850.81x = 374,912,865,099.67
  5. Step 5: Solve for x
    x = 374,912,865,099.67/698,850.81
  6. Step 6: Final answer
    x = 536,470.53

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.